In every embryo, there is a story. But before the story unfolds, before the first division, before development begins, there is a moment that defines it all. DAY ZERO.

The instant fertilization occurs. The meeting of oocyte and spermatozoid. The very first step.

It’s in this moment that your expertise, your precision, your decisions as an IVF professional matter the most. At Kitazato, we’ve always believed in the power of the beginning. That’s why we’ve expanded our IVF & Andrology Media line, to support you in creating the perfect conditions for life, from the very first step. Discover our complete range of media:


A New Generation of IVF & Andrology Media

Our family of media has grown, bringing worldwide with it new, high-performance solutions to support your routines with consistency, quality, and reliability. From the retrieval of oocytes and sperm preparation to the moment of fertilization, we’re with you at every turn.

  • Oocyte retrieval marks the beginning of the IVF journey. Media such as Flushing Buffer and Gamete Buffer provide a stable environment for successful aspiration and gentle handling, ensuring optimal oocyte recovery from the start.

  • Simultaneously, in the andrology lab, precision is essential. From initial sperm preparation using SepaSperm® density gradients, to washing and then cryopreservation with our Sperm Freeze, each product is designed to safeguard sperm quality and maximize performance throughout the process.

  • As the workflow advances to fertilization via ICSI or conventional IVF, specialized media like Hyaluronidase, PVP, and Fertilization Medium offer the ideal conditions to support oocyte denudation, sperm selection, and successful fertilization—setting the stage for healthy embryo development.



New products Highlighs

🔷 Flushing Buffer:

  • Ready-to-use media used for oocyte aspiration and follicular flushing.
  • Improves Oocyte Retrieval.
  • Heparin Inclusion: Supports follicular flushing dissolving eventual clots and enhancing recovery of oocytes.
  • HEPES-Buffered: Ensures stable pH without requiring a CO2 incubator.

🔷 Fertilization Medium:

  • Ready-to-use media
  • Pre-Equilibrated Convenience: Prepares easily for use under oil with CO2 incubation.
  • Nutrient-rich solution: Contains specific sources of energy to enhance fertilization.
  • Optimized for IVF success: Promotes fertilization and oocyte handling up to the 2PN stage.

🔷 Sperm Freeze

  • Ready-to-use media intended for cryopreservation of human sperm.
  • For samples with good initial quality.
  • Extended Stability: Maintains efficacy for 7 days after opening.

🔷 Sperm Freeze G-Plus:

  • Ready-to-use media used for cryopreservation of human sperm.
  • Enhanced Glycerol Content (27%): for compromised samples.
  • Ideal for long-term storage and sperm banks.

With the expanded Kitazato IVF & Andrology Media portfolio, we are proud to stand by your side as you guide new life into being, supporting every phase with precision, care, and confidence.

Because the journey to life deserves nothing less than excellence from the very first step.

From Day Zero.